Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
  • B60B3/06—Disc wheels, i.e. wheels with load-supporting disc body formed by casting
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
  • B22D15/005—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of rolls, wheels or the like
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B1/00—Spoked wheels; Spokes thereof
  • B60B1/06—Wheels with compression spokes
  • B60B1/08—Wheels with compression spokes formed by casting
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
  • Y10S425/058—Undercut

Definitions

• the invention relates to a wheel for a motor vehicle according to the preamble of claim 1.
• a vehicle wheel which has cavities for lightening the weight, in which remaining cores are arranged. These are placed in the mold and overmolded by the casting material. These cores consist either of a metal foam coated with a skin or of a hollow, closed shell.
• the object of the invention is to provide a vehicle wheel, in particular a vehicle wheel with hollow spokes, which can be produced in a simple manner and has a low weight with optimum stability.
• the main advantages achieved with the invention are that both closed cavities and open cavities of the wheel can be produced with a remaining core.
• the core is arranged in the area of a rim flange of the wheel in an annular space formed on one side by the rim and a rim star.
• a mold tool with slides is used, which are arranged close to one another and can be pulled out in connection with a lower mold.
• the first slide located directly next to the lower mold has a cutout for a core part that protrudes from the annular space.
• the second slide closes this recess and the annulus tightly.
• the core can be used according to the invention in cavities of a rim with and without hollow spokes.
• the relevant cavities of the wheel in the hub area, in the wheel spoke and in the horn area can either all or only partially be provided with a core.
• the core is mandatory in the hub area, in the hollow spoke and in the horn area, since this makes it necessary to fix it in the mold.
• the core brands are oriented towards the outside of the design of the wheel so that the core brands - which hold the core in the mold tool - can be easily processed.
• the core brands can consist of a multiplicity of metal pins, which are distributed and arranged projecting to the surface of the core and form a core bearing in the manner of a pin cushion.
• the core in the rim flange has at least one core mark which, when drilled through, forms a receiving bore for a tire valve and thus saves one machining operation.
• the core can have a contoured or rough surface for a better positive connection with the cast material.
• the core can consist of a metal foam with a surrounding layer or skin or a metallic or ceramic closed hollow body.
• the hollow body can be made in several parts or in one part and can be produced by shaping processes or hydroformed.
• the materials from which the hollow body can consist are ceramic materials, aluminum alloys or steel alloys.
• the hollow body can also be filled with foamable metal in order to achieve optimum stability of the hollow body.
• the metal foam core can consist, for example, of an aluminum foam which is protected against influences of the molten cast iron during the casting process.
• This protective layer can be produced by means of the oxidation process (anodization) or by ceramic or spray coating or dip or spray coating with adhering materials.
• the wheel can also consist entirely of a plastic, the cavities being provided with remaining cores, as in the case of a metal wheel.
• the wheel produced in the casting process can be provided with local reinforcements, metallic or ceramic long fiber elements are arranged on the core or on the mold, which are cast over.
• FIG. 1 shows a wheel in section with a remaining core arranged in the rim flange in an open annular space and indicated a mold with two slides
• Fig. 2 shows a wheel in section with a remaining core in the rim flange
• FIG. 4 a wheel in section with in a hollow spoke, and in the hub area and in
• FIG. 5 a wheel in section with core marks designed as needle pins on the core and FIG. 6 a horizontal section through a wheel spoke with needle pins held on the core.
• the wheel 1 has in a ring channel 2 or in cavities 3, 4 and 5 a core 6, 7, 8, 9 remaining after the casting process.
• These cores can be formed from metal foam with a surrounding skin or layer or from a hollow body consisting of one or more shells or can consist of a hollow body filled with metal foam.
• the core 6 is arranged in the rim flange 10 in an annular channel 2 which is open on one side.
• the mold tool consisting of a lower mold part 11, two radial slides 12, 13 and an upper mold part 14 and 14 ', respectively.
• the core 6 is turned off after the casting process in accordance with the final contour of the rim.
• the rim 15 of the wheel 1 can be cast in the mold 14 or 14 'either as a rollable casting 6 or as a "finished" rim 15, which is shown in more detail in FIGS. 1 and 2.
• the rim area is rolled hot or cold to produce a forge-like, higher strength and / or higher ductile metal structure or is produced using the flow-forming process.
• Various casting methods can be used to produce the wheel parts, such as "multi-injection low-pressure casting” (multiple gating points) to reduce the thermal and mechanical stress on the core during the casting process.
• "Die casting” and its variants eg vacuum die casting
• Squeeze Casting and its variants (eg Indirect Squeeze Casting)
• Thiixsocasting" and its variants are examples of the wheel parts.
• FIG. 3 A closed cavity 5 of the wheel 1 with a core 9 in the rim flange 10 is shown in FIG. 3. This is held in the mold by at least one core mark 17. By drilling this core mark 17 and the wall 18 of the rim 15 behind it, a receiving bore 25 is created for a tire valve.
• the cores should preferably be via core marks 17; 20 are held in the mold, which extend to the outside of the wheel 1, as shown in FIG. 4 by way of example.
• the core marks can also consist of a plurality of metallic pins 21, which extend distributed over the surface of the core and result in a core bearing in the manner of a pincushion.
• the core is in the form of a metal foam core, preferably provided with such a coating or skin that makes the metal foam core resistant to the influences of the melt during the casting process.
• the surface of the coating or the outer skin can have a contoured surface structure, ie the coating should according to the invention have a certain roughness so that there is an intimate connection between the casting material and the lost core.
• a wheel with hollow spokes in the cavities 3, 4 and 5 has a core 7, 8 and 9, respectively.
• 5 can also consist of a core 6 according to FIG. 1 and 2 exist. This core 6 can also be used with a full cast rim.
• the core 6 is provided in the annular space 2 open on one side in the rim flange 10 between a rim star F and the rim 15. This requires a mold 11, 14 with two slides 12, 13. One slide 12 has a recess 12a, which is sealed off by the further slide 13. In this recess 12a, a protruding core part 6a is arranged, which is turned along the dash-dotted line in the finished state of the wheel 1.
• reinforcement elements for example metallic or ceramic long fiber elements, are provided on the core and / or on the mold, which are also cast in.
• the vehicle wheel can also consist of a castable plastic, such as thermoplastic or a thermoset, the core or cores being usable like a wheel made of a light metal material.
• the cores can also be made of a correspondingly temperature-resistant plastic foam or plastic hollow body
• Shell construction exist.
• the plastic can be short fiber or long fiber reinforced, fabric or mat reinforced, these reinforcements on the core or on the mold are held accordingly.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Molds, Cores, And Manufacturing Methods Thereof (AREA)
• Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7910865

Family Applications (1)

Country Status (8)

Families Citing this family (12)

Family Cites Families (19)

• 2000
  • 2000-05-20 ES ES00940259T patent/ES2191629T3/es not_active Expired - Lifetime
  • 2000-05-20 EP EP00940259A patent/EP1189765B1/fr not_active Expired - Lifetime
  • 2000-05-20 AU AU55250/00A patent/AU5525000A/en not_active Abandoned
  • 2000-05-20 US US10/009,592 patent/US6758533B1/en not_active Expired - Fee Related
  • 2000-05-20 AT AT00940259T patent/ATE236797T1/de not_active IP Right Cessation
  • 2000-05-20 WO PCT/EP2000/004581 patent/WO2000076785A1/fr active IP Right Grant
  • 2000-05-20 DE DE50001722T patent/DE50001722D1/de not_active Expired - Fee Related
  • 2000-05-20 JP JP2001503270A patent/JP2003502198A/ja not_active Withdrawn

Non-Patent Citations (1)

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